Know Your Environment. Protect Your Health.

Chloroform

Connecticut Water Company - Amston Lake Division

Chloroform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Chloroform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Read More.

In addition to tap water disinfection, chloroform pollution in the environment also comes from industrial discharges from pulp and paper mills, and from urban wastewater effluent. Human studies show that chloroform damages the kidneys, liver and central nervous system. In animals, chloroform causes infertility, birth defects and cancer.

Click here to read more about disinfection byproducts.

 

18

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.02 ppb51ND - 5.10 ppb
20191.65 ppb42ND - 3.90 ppb
20202.85 ppb21ND - 5.70 ppb
20210.250 ppb21ND - 0.500 ppb
20222.10 ppb32ND - 4.40 ppb
20232.05 ppb21ND - 4.10 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.4 ppb

The EWG Health Guideline of 0.4 ppb for chloroform was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-19BZ75818VOC1ND
2018-04-09CA16127VOC1ND
2018-07-23CA95518ND
2018-08-13CB097795.10 ppb
2018-11-15VOC1 200512952ND
2019-02-19VOC1 2005221112.70 ppb
2019-02-19VOC1 200522112ND
2019-04-08VOC1 200527488ND
2019-08-26DBP 2005462383.90 ppb
2020-08-14DBP 2005867745.70 ppb
2020-09-21VOC1 200590982ND
2021-01-06VOC1 200602955ND
2021-08-16DBP 2006287390.500 ppb
2022-08-12CM042274.40 ppb
2022-09-23CM405311.90 ppb
2022-09-23CM40528ND
2023-08-16CO761194.10 ppb
2023-10-24CP33072ND